The best hypothesis about the nature of dark matter is that it consists of particles with no electric charge.What is one reason why dark matter particles must have zero electric charge?
A) They cannot be more massive than an electron.
B) If they did, they would emit photons as they move in external magnetic fields.
C) All charged particles would have been annihilated in particle-antiparticle collisions in the early universe.
D) No elementary particle has electric charge.
E) Charged particles formed only later inside stars.

Question

Quizplus · Accepted Answer

If dark matter particles had electric charge, they would interact with electromagnetic fields and emit photons, which is not observed.

The Best Hypothesis About the Nature of Dark Matter Is